13results about How to "Maintain structural stability" patented technology

The invention discloses a panel lamp light source integration system based on a flexible circuit board, and relates to the technical field of panel lamp light source integration. Generating an initial design drawing of the flexible circuit board containing a plurality of layers of conductive circuits and a plurality of light source bonding pads; the channel configuration module configures a driving control channel for the bonding pad and establishes a mapping table with the lighting function area; the thermal load optimization module calculates power consumption and thermal load distribution according to the mapping table and the performance parameters and adjusts routing topology to generate a final design drawing; and the manufacturing and assembling module is used for manufacturing a circuit board according to the drawing and mounting a micro light source to finish assembling. Wiring is matched with the shape of a panel and the characteristics of a light source during planning, heat distribution optimization is achieved in the layout stage, the number of times of modification is reduced, and local overheating is restrained. According to the invention, high-fit compact integration of the flexible circuit board and the panel lamp is realized, and the assembly efficiency and the operation stability are improved.

The invention belongs to the technical field of electrochemical catalytic materials, and relates to an efficient non-iridium nickel-based catalyst and a preparation method thereof. Comprising a nitrogen-sulfur bifunctional in-situ doped and modified nickel-cobalt layered double hydroxide nanosheet, 2, 5-dihydroxy terephthalamide, a conductive carbon carrier, a pore-forming agent, a surface wetting agent and a cross-linking agent. The nickel-cobalt layered double hydroxide is prepared by carrying out hydrothermal reaction and calcination treatment on nickel nitrate hexahydrate, cobalt nitrate hexahydrate, thiourea and melamine under an alkaline condition, and synergistic doping of nitrogen and sulfur bifunctional groups is realized; organic-inorganic interface interaction is introduced into 2, 5-dihydroxy terephthalamide, so that the structural stability of the material is enhanced. According to the invention, the current density, the mass activity, the gas production volume, the stability and the turnover performance are obviously improved. According to the invention, the defects of insufficient conductivity, limited active sites and poor cycling stability of the existing nickel-cobalt-based catalyst are effectively overcome, and a new thought is provided for developing a low-cost and high-performance electrochemical catalyst.

The utility model discloses junction box aerosol fire extinguishing equipment, and particularly relates to the technical field of fire extinguishing equipment, the junction box aerosol fire extinguishing equipment comprises a junction box body, the rear wall of the inner cavity of the junction box body is fixedly connected with a controller, the front side of the middle part of the right wall of the inner cavity of the junction box body is provided with a fixing mechanism, and the left end of the fixing mechanism is fixedly connected with an aerosol device; the left side of the outer surface of the aerosol device is fixedly connected with a rotating mechanism. According to the aerosol fire extinguishing equipment for the junction box disclosed by the utility model, a plurality of steps of punching, positioning, tightening and the like are not needed when an aerosol device is mounted through the arranged fixing mechanism, and the equipment can be quickly fixed only by aligning an internal structure of the aerosol fire extinguishing equipment to a proper position of the junction box body; physical damage to the junction box body is fundamentally avoided, the service life of the junction box is prolonged, the rotating mechanism can continuously rotate by 360 degrees, and aerosol body fire extinguishing agents are evenly distributed to all spaces of the junction box in an omnibearing mode.

The invention provides a metal-based ceramic composite wear-resistant material and a preparation process thereof, and belongs to the technical field of metal-based ceramic materials. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of a ceramic particle through two-stage coating of the ceramic particle and low-temperature ultrasonic relaxation cooperative treatment, then mixing with metal matrix powder, molding and sintering, and finally, carrying out ultrasonic relaxation treatment at 15-25 DEG C. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of the ceramic particle; according to the process, low-temperature aging micro-crack initiation is effectively inhibited, the number of micro-cracks is only 1.8 / mm < 2 > after the material is aged for 1000 h at the temperature of-10 DEG C, the interface bonding strength reaches 256.7 MPa, the wear resistance attenuation rate is only 9.9%, and the material can be stably adapted to mining machinery scenes in alpine regions.

The utility model discloses a surface laser cladding preheating and slow cooling device which comprises a constant-temperature box, an operation room is arranged on the constant-temperature box, four fans are arranged in the operation room, the fans are fixedly connected with the constant-temperature box, a dust screen is arranged at the tops of the four fans, the dust screen is fixedly connected with the constant-temperature box, and a heating unit is arranged at the top of the dust screen. The heating unit is fixedly connected with the constant temperature box, air deflectors are arranged at the tops of the two ends of the heating unit, the air deflectors are fixedly connected with the constant temperature box, two air guide grooves are formed in the constant temperature box, the air deflectors are arranged at the input ends of the air guide grooves, and two air collecting pipes are arranged in the operation chamber and fixedly connected with the constant temperature box. An air inlet and a plurality of air outlets are formed in the top end of the air collecting pipe. According to the utility model, thermal stress is effectively reduced, and material deformation and stress concentration caused by temperature difference are reduced, so that the risk of crack generation is reduced, and hot cracks caused by rapid cooling are avoided.

The application provides a coating slurry, a preparation method and application thereof, and belongs to the technical field of lithium ion batteries.The preparation method is as follows: dispersing agent, ceramic particle modifier and nano inorganic ceramic particles are dissolved in deionized water, stirring and dispersing until uniform, and then grinding and secondary dispersing; subsequently, water-soluble acrylate-based polymer solution and polyurethane-based polymer emulsion are added, stirring and dispersing until uniform, and then adding a textural structure forming aid and stirring until uniform; finally, a wetting agent is added, stirring and slowly defoaming, and the coating slurry is obtained.The coating slurry provided by the application has heat shrinkage resistance of 150-200 DEG C when applied to a diaphragm, has water resistance, can be coated twice, and can be widely applied to the field of batteries.

The invention discloses a flue gas desulfurization and denitrification energy-saving and environment-friendly device for an industrial boiler, and belongs to the technical field of environment-friendly devices.The flue gas desulfurization and denitrification energy-saving and environment-friendly device comprises a mounting platform and a reactor shell, a reaction cavity, a cleaning cavity and a thermal self-adaption catalysis assembly are arranged in the reactor shell, and a cavity expansion assembly is arranged above the reactor shell; and a flue gas mixing pipe and a discharge pipe are respectively arranged at the end parts of the reactor shell. Through the synergistic effect of the cavity expansion assembly and the cleaning cavity, the reaction space can be dynamically adjusted according to opening and closing of the furnace door of the forging furnace, the denitration activity and the structural stability of the catalytic plug in the furnace door opening period can be maintained by arranging the thermal self-adaptive catalytic assembly, and the denitration efficiency is improved by arranging the cleaning cavity. The multi-stage push cylinder drives the thermal self-adaption catalysis assembly to descend to the cleaning cavity, the high-pressure air nozzle sprays gas to clean the catalysis plug in the descending process, meanwhile, the catalysis plug can be replaced by disassembling the heat preservation clamping plate, and therefore the cleaning and maintaining functions are integrated on a single station, and the working efficiency is improved.

The application belongs to the technical field of polymer materials, and particularly relates to a preparation method and a recycling method of renewable polyimide. The polyimide is prepared first, and then the polyimide is added into an aqueous solution containing an organic base, and stirred and heated to 45-80 DEG C under a nitrogen atmosphere until completely dissolved to obtain a polyimide salt complex solution. Ice acetic acid or citric acid is slowly added into the obtained solution until pH=2-4, and stirred and reacted for 30-60 minutes to protonate the carboxylic acid salt and precipitate polyimide solid. The solid is collected by filtration, washed with deionized water, washed with anhydrous ether again, and dried to obtain renewable polyimide. The method for recycling polyimide utilizes the formation of soluble salt of the organic base and the carboxyl group of the side chain of the polyimide to realize the dissolution and regeneration of the polyimide under mild conditions, and avoids harsh conditions such as strong acid, strong base or high temperature and high pressure.

This invention provides a biomimetic moss-structured carbon nanotube / molybdenum disulfide composite lubricant, its preparation method, and its application. The method involves adding 1-hexadecyl-3-methylimidazole bromide and molybdenum disulfide to deionized water to obtain a molybdenum disulfide dispersion. Carbon nanotubes are then added to the molybdenum disulfide dispersion and ultrasonically dispersed. The mixture is then transferred to a high-pressure reactor and subjected to a hydrothermal reaction at 150-180°C to obtain an initial suspension. After centrifugation to remove unpeeled molybdenum disulfide nanosheets, the supernatant is collected and freeze-dried to obtain the biomimetic moss-structured carbon nanotube / molybdenum disulfide composite lubricant. The preparation method of this invention is simple, requiring no additional impurity removal steps. The solvents used in the entire process are green, environmentally friendly, and pollution-free. The process is easy to control. The prepared carbon quantum dot / molybdenum disulfide composite lubricant exhibits a short break-in period and long-lasting lubrication effect in water, oil, and other liquid environments.

This invention discloses a continuous dispersion and heat-damage-preventing drying process for wet carbon fiber materials, belonging to the field of carbon fiber drying technology. The process includes: obtaining the initial moisture content of the wet carbon fiber material and determining the drying process parameters; filtering and heat-exchanging the process gas to form a drying medium; feeding the wet carbon fiber material into a zoned cooling Venturi tube for high-speed deagglomeration and dispersion, and cooling and temperature control of the throat area of ​​the Venturi tube; allowing the deagglomerated gas-solid mixture to enter a staged expansion flash tube for flash drying; subsequently, entering a cyclone dryer for suspension deep drying, and detecting the moisture content of the bottom discharge, adjusting the feed rate, flash heating charge, and return ratio based on the detection results; the dust-laden hot gas discharged from the cyclone dryer is purified by a bag filter, and the recovery ratio is adjusted according to the dew point and temperature of the purified hot gas. This invention can reduce the risk of material agglomeration and localized heat damage, and improve drying uniformity, moisture content stability, and thermal energy utilization.

The utility model discloses a cylinder body assembly of a wear-resistant hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders, and has the technical key points that the cylinder body assembly comprises a cylindrical cylinder body which is coaxially sleeved, and the cylinder body sequentially comprises an outer layer, a middle buffer layer and an inner wear-resistant layer from outside to inside; the outer layer and the middle buffer layer are connected in a meshed mode through the structure of the axial protrusions and the axial grooves. Honeycomb-shaped damping cavities which are annularly and uniformly distributed are formed in the middle buffer layer, and the damping cavities are hexagonal columnar cavities; a plurality of axial wear-resistant ribs are annularly and uniformly distributed on the inner wall of the inner wear-resistant layer; the utility model can ensure the wear resistance, improve the mechanical strength of the cylinder barrel and ensure the service life.

This invention discloses a fully automatic flexible feeding device for medical braided sheath mandrels, comprising a feeding robotic arm and a braiding machine body located to the left of the feeding robotic arm. The feeding robotic arm is equipped with mechanical claws for gripping the sheath mandrel. The braiding machine body is fixedly mounted with equidistant sliding guide rails, each with a sliding seat. A receiving block is fixedly mounted on the top of each sliding seat, and a circular block is rotatably connected to the top of the receiving block. A braiding conveyor seat is fixedly mounted on the braiding machine body. This invention employs multi-segment support for the sheath mandrel, combined with rotational and translational motion, to feed the sheath mandrel. This maintains the structural stability of the flexible sheath mandrel. Simultaneously, after feeding, the sheath mandrel is positioned within a through-hole, constraining and restricting it, ensuring feeding stability, facilitating braiding processing, and improving the braiding quality of the medical braided sheath mandrel.

This invention discloses a pre-fusion F protein of respiratory syncytial virus (RSV) and its applications. The pre-fusion F protein is a recombinant pre-fusion F protein of RSV modified with amino acid mutations. The mutation modification method is selected from any of the following: (1) point mutation of amino acids based on the full-length sequence of wild-type pre-fusion F protein; (2) first deleting the transmembrane / intracellular region of the full-length sequence of wild-type pre-fusion F protein, and then attaching the fibritin / Throm / 6his / Stretaq sequence to its C-terminus, and then mutating K at amino acid position 75 to C and S at amino acid position 215 to C. This invention utilizes protein genetic engineering techniques to rationally optimize the amino acid sequence of the pre-fusion F protein of RSV. Compared with the wild-type F protein, the pre-fusion F recombinant protein modified with amino acid mutations has improved stability and immunogenicity.